Re: [PATCHv10 0/9] write hints with nvme fdp, scsi streams

[Keith Busch <kbusch@kernel.org>]

On Tue, Nov 05, 2024 at 04:50:14PM +0100, Christoph Hellwig wrote:
> I've pushed my branch that tries to make this work with the XFS
> data separation here:
> 
> http://git.infradead.org/?p=users/hch/xfs.git;a=shortlog;h=refs/heads/xfs-zoned-streams
> 
> This is basically my current WIP xfs zoned (aka always write out place)
> work optimistically destined for 6.14 + the patch set in this thread +
> a little fix to make it work for nvme-multipath plus the tiny patch to
> wire it up.
> 
> The good news is that the API from Keith mostly works.  I don't really
> know how to cope with the streams per partition bitmap, and I suspect
> this will need to be dealt with a bit better.  One option might be
> to always have a bitmap, which would also support discontiguous
> write stream numbers as actually supported by the underlying NVMe
> implementation, another option would be to always map to consecutive
> numbers.

Thanks for sharing that. Seeing the code makes it much easier to
understand where you're trying to steer this. I'll take a look and
probably have some feedback after a couple days going through it.